Roller blind arrangement with winding shaft hollow tube

Abstract

A roller blind arrangement for a motor vehicle, having a roller blind web and a winding shaft onto which the roller blind web can be wound and from which the roller blind web can be unwound and which has a flexible hollow tube arrangement penetrated by a bearing beam attached to the vehicle. The hollow tube arrangement may have a hollow tube element which, viewed in the axial direction, may have multiple flexible portions interrupted by at least one stabilizing portion having a greater torsional strength than the flexible portions.

The invention claimed is: 
     
       1. A roller blind arrangement for a motor vehicle, the roller blind arrangement comprising:
 a roller blind web and 
 a winding shaft onto which the roller blind web can be wound and from which the roller blind web can be unwound and which comprises a flexible hollow tube arrangement penetrated by a bearing beam attached to the vehicle, 
 wherein the hollow tube arrangement comprises a hollow tube element which, viewed in the axial direction, comprises multiple flexible portions interrupted by at least one stabilizing portion which provides greater torsional strength than the flexible portions; 
 wherein the at least one stabilizing portion of the hollow tube element comprises a plastic overmolded base tube, 
 wherein the base tube is a corrugated tube and its plastic overmold forms a circumferential surface whose radius is equal to a maximum outer radius of the corrugated tube, 
 wherein the plastic overmold is formed on the corrugated tube in an annular shape and disposed in spaces between ribs of the corrugated tube, and 
 wherein the at least one stabilizing portion comprises at least two stabilizing portion ribs and two spaces between the at least two stabilizing portion ribs. 
 
     
     
       2. The roller blind arrangement according to  claim 1 , wherein the hollow tube element is formed by a single-piece plastic tube comprising a corrugated tube portion for forming the flexible portions and a smooth tube portion for forming the at least one stabilizing portion. 
     
     
       3. The roller blind arrangement according to  claim 1 , wherein the hollow tube element is a blow-molded part. 
     
     
       4. The roller blind arrangement according to  claim 1 , wherein the roller blind web has a guide tape at each of its lateral edges with respect to a roller blind longitudinal center plane. 
     
     
       5. The roller blind arrangement according to  claim 1 , wherein the hollow tube element is provided with a bearing bush in a non-rotating manner at each of its two ends. 
     
     
       6. The roller blind arrangement according to  claim 5 , wherein a coupling element is connected in a non-rotating manner between each of the bearing bushes and the hollow tube element. 
     
     
       7. The roller blind arrangement according to  claim 1 , wherein the bearing beam is curved. 
     
     
       8. A roller blind arrangement for a motor vehicle, the roller blind arrangement comprising:
 a roller blind web and 
 a winding shaft onto which the roller blind web can be wound and from which the roller blind web can be unwound and which comprises a flexible hollow tube arrangement penetrated by a bearing beam attached to the vehicle, 
 wherein the hollow tube arrangement comprises a hollow tube element which, viewed in the axial direction, comprises multiple flexible portions interrupted by at least one stabilizing portion which provides greater torsional strength than the flexible portions; 
 wherein the at least one stabilizing portion of the hollow tube element comprises a plastic overmolded base tube, 
 wherein the base tube is a corrugated tube and its plastic overmold forms a circumferential surface whose radius is equal to a maximum outer radius of the corrugated tube, 
 wherein the plastic overmold is formed on the corrugated tube in an annular shape and disposed in spaces between ribs of the corrugated tube, 
 wherein the hollow tube element is provided with a bearing bush in a non-rotating manner at each of its two ends, 
 wherein a coupling element is connected in a non-rotating manner between each of the bearing bushes and the hollow tube element, and 
 wherein each coupling element is formed by a plastic overmolding of the hollow tube element.